Two-dimensional (T_eff and [Fe/H]) dependence of the SB1 fraction using set 2. Left, middle and right panels refer to dwarfs, giants, and total GES iDR5 targets, for which we have recommended T_eff and [Fe/H] values. The colour scale corresponds to the number of stars per bin (top panels), the uncorrected SB1 fractions per bin (middle panels), and the SB1 fraction corrected for the detection efficiency η (Table 6, bottom panels). The number of stars is indicated in the lower left corner of each bin, while the SB1 fraction is listed in the upper left corner.